Stretch blow molded container and production process thereof

Details Stretch blow molded container and production process thereof Stretch blow molded container and production process thereof

1999-05-04

2000-12-12

Dye, Rena L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264532, 264537, 264539, 26433121, 264148, B29C 4912, B29C 4904, B29C 4700

Patent

active

061594164

ABSTRACT:
The invention provides a stretch blow molded container formed from a thermoplastic resin material which comprises polyglycolic acid having
(a) a repeating unit represented by the following formula (1): ##STR1## (b) a melt viscosity, .eta.* [as measured at a temperature of (the melting point, Tm of the polymer+20.degree. C.) and a shear rate of 100/sec] of 500-100,000 Pa.s;
(c) a melting point, Tm of at least 180.degree. C.;
(d) a melt enthalpy, .DELTA.Hm of at least 20 J/g; and
(e) a density of at least 1.50 g/cm.sup.3 as measured in an unoriented, crystallized form,
wherein the stretch blow molded container has tensile strength (in a circumferential direction) of at least 100 MPa and a carbon dioxide permeability (as measured at a temperature of 23.degree. C. and 80% relative humidity; in terms of the thickness of 50 .mu.m) of 300 cc/m.sup.2.day.atm or smaller at the body sidewall thereof, and a production process thereof.

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European Patent Office Communication, including European Search Report for EP 97 30 3144 dated Feb. 5,1998.

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